Why DX50 is on
Daughtercard The DX50 *always* sits on the second card stacked on the
base-card with the MCA-connector. This is caused by the odd Intel
cache chipset, which has a limitation on the distance it can be installed
away from the CPU ... And while there was not enough room to stuff everything
on one single printboard the cpu and cache sit in the "upper floor".

Daughtercard
ReworkDr. Jim
sez: Documenting patch wire locations is great, but remember that there
are often foil cuts associated with them. And you can't always see
all of those.Ed.
One can dream, can't we?

I have seen one card with the older BIOS
41G9251 ('92) that has NO rework. The three DX50 I have with the new BIOS
52G9619 ('93) all have the rework. Why? Haven't a clue.

J1 Earlier versions had a
double pin-row connector at that place ... intended for the (or: one) precessor
of the Systems Management Adapter used on "high availability network servers".

Diagnostic LEDs The 50-MHz Type 3 processor board in a 90/95 (submodel
code 28 and 29), has two LEDs; one in position CR1, and one in CR2. During
POST, CR1 should come on momentarily and CR2 should stay off. If the LEDs
work any other way, suspect that the processor board is defective.
Use the LEDs to help differentiate between a processor
board or a system board failure. If you are instructed to replace one of
the boards, and the problem still exists, replace the other board (also
reinstall the first board). (Ed. Reports
coming in make me wonder about any of this. If the board passes diagnostics,
and works normally, do you really care about the LEDs?)

> I was all set to install a power stacker 133/586 on my dx50 in the
9595-omt. I for some reason decided to RTFM while having a cuppa. they
say the powerstacker will not work with dx50. what cpu can I use to juice
up the dx50.?

Jim Shorney
Pay no attention to the manual. Set the multiplier
to x3, the cache jumper (if present) to write-through, and plug it in.
It will probably work fine.